Make scripts/pipeline_generator.py usable again.
Make scripts/pipeline_generator.py usable again.

Before this commit:

```
$ utils/pass-pipeline/scripts/pipeline_generator.py
utils/pass-pipeline/scripts/pipeline_generator.py
Traceback (most recent call last):
  File "utils/pass-pipeline/scripts/pipeline_generator.py", line 15, in <module>
    normal_pipeline = [x for x in pass_pipeline_library.normal_passpipelines()]
  File "/path/to/swift/utils/pass-pipeline/src/pass_pipeline_library.py", line 106, in normal_passpipelines
    x.addPass(specialization_passlist())
NameError: global name 'specialization_passlist' is not defined
```

After this commit:

```
$ utils/pass-pipeline/scripts/pipeline_generator.py
[
    [
        "HighLevel",
        "run_n_times",
        2,
        "SimplifyCFG",
…
```

amraboelela/swift,KrishMunot/swift,roambotics/swift,deyton/swift,CodaFi/swift,calebd/swift,modocache/swift,shajrawi/swift,nathawes/swift,stephentyrone/swift,shajrawi/swift,gottesmm/swift,allevato/swift,tinysun212/swift-windows,jmgc/swift,jmgc/swift,jckarter/swift,brentdax/swift,kperryua/swift,KrishMunot/swift,hughbe/swift,xedin/swift,jmgc/swift,practicalswift/swift,JaSpa/swift,glessard/swift,frootloops/swift,jckarter/swift,allevato/swift,airspeedswift/swift,slavapestov/swift,atrick/swift,uasys/swift,kstaring/swift,uasys/swift,lorentey/swift,atrick/swift,huonw/swift,alblue/swift,harlanhaskins/swift,practicalswift/swift,adrfer/swift,ken0nek/swift,hughbe/swift,tkremenek/swift,ahoppen/swift,airspeedswift/swift,zisko/swift,djwbrown/swift,jtbandes/swift,amraboelela/swift,austinzheng/swift,arvedviehweger/swift,nathawes/swift,tinysun212/swift-windows,calebd/swift,milseman/swift,OscarSwanros/swift,gottesmm/swift,russbishop/swift,gmilos/swift,amraboelela/swift,austinzheng/swift,jtbandes/swift,amraboelela/swift,zisko/swift,calebd/swift,benlangmuir/swift,dreamsxin/swift,ken0nek/swift,therealbnut/swift,zisko/swift,airspeedswift/swift,gregomni/swift,deyton/swift,IngmarStein/swift,brentdax/swift,practicalswift/swift,benlangmuir/swift,return/swift,arvedviehweger/swift,manavgabhawala/swift,shahmishal/swift,jckarter/swift,devincoughlin/swift,adrfer/swift,arvedviehweger/swift,practicalswift/swift,tkremenek/swift,glessard/swift,rudkx/swift,milseman/swift,gregomni/swift,xedin/swift,OscarSwanros/swift,brentdax/swift,ahoppen/swift,natecook1000/swift,hughbe/swift,parkera/swift,uasys/swift,gribozavr/swift,deyton/swift,modocache/swift,JGiola/swift,sschiau/swift,ben-ng/swift,therealbnut/swift,johnno1962d/swift,Jnosh/swift,gregomni/swift,austinzheng/swift,airspeedswift/swift,SwiftAndroid/swift,shajrawi/swift,alblue/swift,russbishop/swift,atrick/swift,practicalswift/swift,gribozavr/swift,felix91gr/swift,jtbandes/swift,tinysun212/swift-windows,SwiftAndroid/swift,stephentyrone/swift,roambotics/swift,harlanhaskins/swift,jckarter/swift,johnno1962d/swift,deyton/swift,alblue/swift,kstaring/swift,karwa/swift,russbishop/swift,apple/swift,karwa/swift,modocache/swift,Jnosh/swift,gribozavr/swift,harlanhaskins/swift,russbishop/swift,sschiau/swift,tinysun212/swift-windows,devincoughlin/swift,xwu/swift,tardieu/swift,swiftix/swift,alblue/swift,bitjammer/swift,ahoppen/swift,johnno1962d/swift,bitjammer/swift,felix91gr/swift,manavgabhawala/swift,xedin/swift,Jnosh/swift,austinzheng/swift,return/swift,gregomni/swift,gmilos/swift,KrishMunot/swift,felix91gr/swift,calebd/swift,lorentey/swift,devincoughlin/swift,hooman/swift,karwa/swift,devincoughlin/swift,atrick/swift,jckarter/swift,karwa/swift,tjw/swift,CodaFi/swift,gottesmm/swift,airspeedswift/swift,karwa/swift,xedin/swift,jtbandes/swift,jtbandes/swift,allevato/swift,dreamsxin/swift,jopamer/swift,tjw/swift,zisko/swift,russbishop/swift,xwu/swift,KrishMunot/swift,frootloops/swift,IngmarStein/swift,gottesmm/swift,jopamer/swift,natecook1000/swift,djwbrown/swift,slavapestov/swift,JGiola/swift,return/swift,kstaring/swift,ben-ng/swift,dduan/swift,nathawes/swift,jtbandes/swift,gmilos/swift,swiftix/swift,kperryua/swift,jopamer/swift,apple/swift,ben-ng/swift,parkera/swift,natecook1000/swift,modocache/swift,hooman/swift,alblue/swift,frootloops/swift,lorentey/swift,xwu/swift,harlanhaskins/swift,gottesmm/swift,JaSpa/swift,stephentyrone/swift,apple/swift,practicalswift/swift,therealbnut/swift,gmilos/swift,kstaring/swift,tardieu/swift,uasys/swift,dduan/swift,lorentey/swift,devincoughlin/swift,aschwaighofer/swift,felix91gr/swift,xwu/swift,danielmartin/swift,jopamer/swift,shajrawi/swift,OscarSwanros/swift,JGiola/swift,sschiau/swift,CodaFi/swift,stephentyrone/swift,tardieu/swift,felix91gr/swift,tkremenek/swift,Jnosh/swift,amraboelela/swift,harlanhaskins/swift,benlangmuir/swift,kstaring/swift,jmgc/swift,adrfer/swift,tinysun212/swift-windows,brentdax/swift,IngmarStein/swift,therealbnut/swift,alblue/swift,tardieu/swift,shahmishal/swift,nathawes/swift,tardieu/swift,ben-ng/swift,return/swift,parkera/swift,jopamer/swift,tkremenek/swift,dduan/swift,SwiftAndroid/swift,ken0nek/swift,natecook1000/swift,deyton/swift,tjw/swift,allevato/swift,gribozavr/swift,huonw/swift,SwiftAndroid/swift,lorentey/swift,arvedviehweger/swift,djwbrown/swift,kperryua/swift,rudkx/swift,amraboelela/swift,OscarSwanros/swift,russbishop/swift,karwa/swift,gottesmm/swift,airspeedswift/swift,natecook1000/swift,hooman/swift,jmgc/swift,therealbnut/swift,JGiola/swift,johnno1962d/swift,gribozavr/swift,frootloops/swift,bitjammer/swift,gribozavr/swift,lorentey/swift,OscarSwanros/swift,practicalswift/swift,CodaFi/swift,nathawes/swift,rudkx/swift,manavgabhawala/swift,JaSpa/swift,hughbe/swift,JGiola/swift,arvedviehweger/swift,harlanhaskins/swift,stephentyrone/swift,gribozavr/swift,codestergit/swift,shahmishal/swift,parkera/swift,frootloops/swift,uasys/swift,gregomni/swift,slavapestov/swift,tjw/swift,xedin/swift,JaSpa/swift,parkera/swift,parkera/swift,ken0nek/swift,ben-ng/swift,ahoppen/swift,tkremenek/swift,devincoughlin/swift,uasys/swift,djwbrown/swift,dduan/swift,devincoughlin/swift,tinysun212/swift-windows,kstaring/swift,jmgc/swift,adrfer/swift,arvedviehweger/swift,austinzheng/swift,IngmarStein/swift,codestergit/swift,jopamer/swift,deyton/swift,felix91gr/swift,milseman/swift,felix91gr/swift,stephentyrone/swift,xwu/swift,rudkx/swift,dduan/swift,karwa/swift,gmilos/swift,johnno1962d/swift,parkera/swift,ahoppen/swift,SwiftAndroid/swift,hughbe/swift,xwu/swift,codestergit/swift,ken0nek/swift,adrfer/swift,brentdax/swift,Jnosh/swift,tjw/swift,natecook1000/swift,calebd/swift,nathawes/swift,shahmishal/swift,ken0nek/swift,zisko/swift,ahoppen/swift,swiftix/swift,practicalswift/swift,tkremenek/swift,OscarSwanros/swift,dduan/swift,allevato/swift,glessard/swift,therealbnut/swift,danielmartin/swift,danielmartin/swift,CodaFi/swift,slavapestov/swift,return/swift,shahmishal/swift,uasys/swift,return/swift,tkremenek/swift,SwiftAndroid/swift,xwu/swift,benlangmuir/swift,kstaring/swift,sschiau/swift,shajrawi/swift,austinzheng/swift,alblue/swift,frootloops/swift,allevato/swift,arvedviehweger/swift,amraboelela/swift,bitjammer/swift,aschwaighofer/swift,gmilos/swift,jopamer/swift,djwbrown/swift,atrick/swift,adrfer/swift,rudkx/swift,aschwaighofer/swift,bitjammer/swift,shajrawi/swift,Jnosh/swift,austinzheng/swift,codestergit/swift,shajrawi/swift,swiftix/swift,JaSpa/swift,roambotics/swift,IngmarStein/swift,rudkx/swift,aschwaighofer/swift,modocache/swift,IngmarStein/swift,danielmartin/swift,shahmishal/swift,gregomni/swift,johnno1962d/swift,slavapestov/swift,codestergit/swift,atrick/swift,huonw/swift,gmilos/swift,xedin/swift,modocache/swift,kperryua/swift,adrfer/swift,IngmarStein/swift,hooman/swift,huonw/swift,KrishMunot/swift,shahmishal/swift,gottesmm/swift,hughbe/swift,hooman/swift,danielmartin/swift,milseman/swift,CodaFi/swift,manavgabhawala/swift,johnno1962d/swift,jckarter/swift,ben-ng/swift,huonw/swift,return/swift,manavgabhawala/swift,xedin/swift,hooman/swift,JGiola/swift,glessard/swift,hughbe/swift,danielmartin/swift,swiftix/swift,milseman/swift,kperryua/swift,devincoughlin/swift,sschiau/swift,OscarSwanros/swift,roambotics/swift,tardieu/swift,djwbrown/swift,aschwaighofer/swift,huonw/swift,tardieu/swift,KrishMunot/swift,aschwaighofer/swift,tinysun212/swift-windows,jtbandes/swift,milseman/swift,karwa/swift,bitjammer/swift,manavgabhawala/swift,huonw/swift,sschiau/swift,KrishMunot/swift,slavapestov/swift,shahmishal/swift,xedin/swift,Jnosh/swift,danielmartin/swift,therealbnut/swift,benlangmuir/swift,apple/swift,roambotics/swift,milseman/swift,natecook1000/swift,codestergit/swift,roambotics/swift,stephentyrone/swift,codestergit/swift,slavapestov/swift,bitjammer/swift,glessard/swift,lorentey/swift,brentdax/swift,swiftix/swift,parkera/swift,harlanhaskins/swift,frootloops/swift,tjw/swift,kperryua/swift,brentdax/swift,shajrawi/swift,deyton/swift,manavgabhawala/swift,nathawes/swift,glessard/swift,lorentey/swift,gribozavr/swift,russbishop/swift,zisko/swift,apple/swift,allevato/swift,kperryua/swift,sschiau/swift,tjw/swift,zisko/swift,aschwaighofer/swift,CodaFi/swift,calebd/swift,dduan/swift,swiftix/swift,JaSpa/swift,SwiftAndroid/swift,ben-ng/swift,calebd/swift,jckarter/swift,airspeedswift/swift,djwbrown/swift,sschiau/swift,hooman/swift,jmgc/swift,JaSpa/swift,apple/swift,benlangmuir/swift,modocache/swift,ken0nek/swift