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

*** 34,45 ****
   *
   * Note: If you change it, you need to change it in the following files as
   * well:
   *
   *  - lib/libc/i386/gen/makectxt.c
!  *  - lib/common/i386/crti.s
!  *  - lib/common/i386/crt1.s
   */
  #undef  STACK_ALIGN
  #define STACK_ALIGN     16
  
  extern int getlwpstatus(thread_t, lwpstatus_t *);
--- 34,45 ----
   *
   * Note: If you change it, you need to change it in the following files as
   * well:
   *
   *  - lib/libc/i386/gen/makectxt.c
!  *  - lib/crt/i86/crti.s
!  *  - lib/crt/i86/crt1.s
   */
  #undef  STACK_ALIGN
  #define STACK_ALIGN     16
  
  extern int getlwpstatus(thread_t, lwpstatus_t *);