add important JVM arguments for buck launched with NO_BUCKD
add important JVM arguments for buck launched with NO_BUCKD

Summary:
Without `-XX:SoftRefLRUPolicyMSPerMB=0`, running Buck can have really bad performance with `NO_BUCKD`, as the JVM is not aggressive enough about clearing `SoftReference`s.  It seemed best to also enable the G1 GC in `NO_BUCKD` mode but this may not be as critical.  The other JVM args passed when using the Buck daemon seemed less relevant without the daemon.
Closes https://github.com/facebook/buck/pull/1310

fbshipit-source-id: 6e77ef6

rmaz/buck,JoelMarcey/buck,nguyentruongtho/buck,romanoid/buck,ilya-klyuchnikov/buck,LegNeato/buck,shs96c/buck,SeleniumHQ/buck,zpao/buck,kageiit/buck,JoelMarcey/buck,rmaz/buck,marcinkwiatkowski/buck,shybovycha/buck,Addepar/buck,clonetwin26/buck,brettwooldridge/buck,rmaz/buck,shs96c/buck,rmaz/buck,ilya-klyuchnikov/buck,shybovycha/buck,robbertvanginkel/buck,k21/buck,facebook/buck,rmaz/buck,shs96c/buck,k21/buck,rmaz/buck,shybovycha/buck,Addepar/buck,marcinkwiatkowski/buck,dsyang/buck,LegNeato/buck,k21/buck,clonetwin26/buck,romanoid/buck,zhan-xiong/buck,robbertvanginkel/buck,robbertvanginkel/buck,marcinkwiatkowski/buck,ilya-klyuchnikov/buck,zhan-xiong/buck,shs96c/buck,facebook/buck,rmaz/buck,shs96c/buck,romanoid/buck,k21/buck,clonetwin26/buck,k21/buck,k21/buck,marcinkwiatkowski/buck,dsyang/buck,dsyang/buck,zpao/buck,shs96c/buck,SeleniumHQ/buck,brettwooldridge/buck,brettwooldridge/buck,shybovycha/buck,romanoid/buck,robbertvanginkel/buck,SeleniumHQ/buck,Addepar/buck,JoelMarcey/buck,marcinkwiatkowski/buck,kageiit/buck,k21/buck,shs96c/buck,robbertvanginkel/buck,k21/buck,shybovycha/buck,kageiit/buck,rmaz/buck,romanoid/buck,SeleniumHQ/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,Addepar/buck,LegNeato/buck,Addepar/buck,Addepar/buck,zpao/buck,Addepar/buck,nguyentruongtho/buck,LegNeato/buck,kageiit/buck,rmaz/buck,zhan-xiong/buck,dsyang/buck,robbertvanginkel/buck,zhan-xiong/buck,dsyang/buck,zhan-xiong/buck,brettwooldridge/buck,shs96c/buck,clonetwin26/buck,robbertvanginkel/buck,romanoid/buck,Addepar/buck,Addepar/buck,kageiit/buck,shybovycha/buck,Addepar/buck,marcinkwiatkowski/buck,robbertvanginkel/buck,shybovycha/buck,JoelMarcey/buck,zhan-xiong/buck,brettwooldridge/buck,k21/buck,nguyentruongtho/buck,rmaz/buck,robbertvanginkel/buck,shs96c/buck,facebook/buck,Addepar/buck,brettwooldridge/buck,shybovycha/buck,shybovycha/buck,LegNeato/buck,dsyang/buck,clonetwin26/buck,Addepar/buck,robbertvanginkel/buck,JoelMarcey/buck,dsyang/buck,brettwooldridge/buck,clonetwin26/buck,SeleniumHQ/buck,SeleniumHQ/buck,kageiit/buck,marcinkwiatkowski/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,Addepar/buck,rmaz/buck,shybovycha/buck,JoelMarcey/buck,JoelMarcey/buck,clonetwin26/buck,ilya-klyuchnikov/buck,zhan-xiong/buck,shs96c/buck,clonetwin26/buck,nguyentruongtho/buck,SeleniumHQ/buck,kageiit/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,rmaz/buck,zpao/buck,marcinkwiatkowski/buck,dsyang/buck,shybovycha/buck,shs96c/buck,brettwooldridge/buck,LegNeato/buck,marcinkwiatkowski/buck,marcinkwiatkowski/buck,ilya-klyuchnikov/buck,zhan-xiong/buck,LegNeato/buck,brettwooldridge/buck,SeleniumHQ/buck,k21/buck,marcinkwiatkowski/buck,LegNeato/buck,romanoid/buck,JoelMarcey/buck,k21/buck,brettwooldridge/buck,LegNeato/buck,dsyang/buck,LegNeato/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,dsyang/buck,shybovycha/buck,romanoid/buck,dsyang/buck,zpao/buck,SeleniumHQ/buck,robbertvanginkel/buck,romanoid/buck,zpao/buck,k21/buck,romanoid/buck,zhan-xiong/buck,ilya-klyuchnikov/buck,zhan-xiong/buck,shybovycha/buck,zhan-xiong/buck,romanoid/buck,romanoid/buck,nguyentruongtho/buck,ilya-klyuchnikov/buck,marcinkwiatkowski/buck,clonetwin26/buck,marcinkwiatkowski/buck,nguyentruongtho/buck,dsyang/buck,brettwooldridge/buck,shs96c/buck,zhan-xiong/buck,JoelMarcey/buck,LegNeato/buck,clonetwin26/buck,brettwooldridge/buck,zpao/buck,SeleniumHQ/buck,robbertvanginkel/buck,clonetwin26/buck,clonetwin26/buck,shs96c/buck,ilya-klyuchnikov/buck,dsyang/buck,k21/buck,facebook/buck,ilya-klyuchnikov/buck,rmaz/buck,nguyentruongtho/buck,LegNeato/buck,clonetwin26/buck,brettwooldridge/buck,JoelMarcey/buck,romanoid/buck,facebook/buck,LegNeato/buck,JoelMarcey/buck,facebook/buck,JoelMarcey/buck,SeleniumHQ/buck,facebook/buck,zhan-xiong/buck