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

*** 179,190 ****
          $(COMPILE.c) -o $@ $<
  
  objs.xpg4:
          -@mkdir -p $@
  
! objs.xpg4/values-xpg4.o:        ../../lib/common/common/values-xpg4.c
!         $(COMPILE.c) -o $@ ../../lib/common/common/values-xpg4.c
  
  %.o:                    $(SRC)/common/util/%.c
          $(COMPILE.c) $(OUTPUT_OPTION) $<
          $(POST_PROCESS_O)
  
--- 179,190 ----
          $(COMPILE.c) -o $@ $<
  
  objs.xpg4:
          -@mkdir -p $@
  
! objs.xpg4/values-xpg4.o:        ../../lib/crt/common/values-xpg4.c
!         $(COMPILE.c) -o $@ ../../lib/crt/common/values-xpg4.c
  
  %.o:                    $(SRC)/common/util/%.c
          $(COMPILE.c) $(OUTPUT_OPTION) $<
          $(POST_PROCESS_O)