[CMake] Android NDK r12 appends ".x" to libgcc dir
[CMake] Android NDK r12 appends ".x" to libgcc dir

The Android NDK r12 release appends a ".x" to the libgcc directory;
it is now:

```
android-ndk-r12/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x
```

Update the linker path for the Android build to accomodate this change.

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