Change xcvmem tests to run for Os and Oz

Created by: MaryBennett

Partial fix for issue #58 (closed) and tidy up

6 tests still require Os or Oz. 16 tests require Og.

Files Changed:

• cv-mem-lb-compile-1.c
• cv-mem-lb-compile-2.c
• cv-mem-lb-compile-3.c
• cv-mem-lbu-compile-1.c
• cv-mem-lbu-compile-2.c
• cv-mem-lbu-compile-3.c
• cv-mem-lh-compile-1.c
• cv-mem-lh-compile-2.c
• cv-mem-lh-compile-3.c
• cv-mem-lhu-compile-1.c
• cv-mem-lhu-compile-2.c
• cv-mem-lhu-compile-3.c
• cv-mem-lw-compile-1.c
• cv-mem-lw-compile-2.c
• cv-mem-lw-compile-3.c
• cv-mem-sb-compile-1.c
• cv-mem-sb-compile-2.c
• cv-mem-sb-compile-3.c
• cv-mem-sh-compile-1.c
• cv-mem-sh-compile-2.c
• cv-mem-sh-compile-3.c
• cv-mem-sw-compile-1.c
• cv-mem-sw-compile-2.c
• cv-mem-sw-compile-3.c

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