crt: Need a position-independent CRT for PIE
- Implement the greatest possible part of the crt1 in C
- Implement SPARC versions of the ASM sections of crt1
- Build crt1 position-independently, minor ASM updates to be position
  independent
- Implement crt1 with the hook expected by modern GCC to support
  profiling, make gcrt1 a symlink for source compatibility (older GCC
  initializes profiling at firsnt use of _mcount if necessary, so
  doesn't need the gcrt)
- Split the CRT out of developer/library/lint into a separate c-runtime package

*** 115,129 ****
          $(POST_PROCESS)
  
  $(XD4)/compile.o $(XD6)/compile.o: ../../expr/compile.c
          $(COMPILE.c) -o $@ ../../expr/compile.c
  
! %values-xpg4.o: ../../../lib/common/common/values-xpg4.c
!         $(COMPILE.c) -o $@ ../../../lib/common/common/values-xpg4.c
  
! %values-xpg6.o: ../../../lib/common/common/values-xpg6.c
!         $(COMPILE.c) -o $@ ../../../lib/common/common/values-xpg6.c
  
  $(XPG4EXOBJS): $(XD4)
  
  $(XPG6EXOBJS): $(XD6)
  
--- 115,129 ----
          $(POST_PROCESS)
  
  $(XD4)/compile.o $(XD6)/compile.o: ../../expr/compile.c
          $(COMPILE.c) -o $@ ../../expr/compile.c
  
! %values-xpg4.o: ../../../lib/crt/common/values-xpg4.c
!         $(COMPILE.c) -o $@ ../../../lib/crt/common/values-xpg4.c
  
! %values-xpg6.o: ../../../lib/crt/common/values-xpg6.c
!         $(COMPILE.c) -o $@ ../../../lib/crt/common/values-xpg6.c
  
  $(XPG4EXOBJS): $(XD4)
  
  $(XPG6EXOBJS): $(XD6)