Add missing ; characters to mono-hwcap-sparc.c. Fixes build failure.

  CC       mono-hwcap-sparc.lo
mono-hwcap-sparc.c: In function 'mono_hwcap_arch_init':
mono-hwcap-sparc.c:53:2: error: expected ';' before 'else'
make[4]: *** [mono-hwcap-sparc.lo] Error 1