Test build failed due to UCLIBC_INTERNAL header rework

[Carmelo AMOROSO]

Hello,
recent change on libc_hidden_proto brakes test and utils build.
The problem is that test are built with UCLIBC_INTERNAL macro defined
due to inclusion of top Rules.mak causing the libc_hidden_proto to be 
visible.
So we could move the definition of the UCLIBC_INTERNAL macro within 
Makefile.in
for example or filter-out if from the CFLAGS in test/Rules.mk.

Below the error log

make: Entering directory `/home/work/uClibc-work/SVN/trunk/test'
  TEST_LINK args/ arg_test
  TEST_LINK assert/ assert
make[1]: Nothing to be done for `compile'.
  TEST_LINK crypt/ crypt
  TEST_LINK crypt/ md5c-test
md5c-test.o: In function `main':
md5c-test.c:(.text+0x5c): undefined reference to `__GI_strcmp'
collect2: ld returned 1 exit status
make[1]: *** [md5c-test] Error 1
make: *** [_dircompile_crypt] Error 2
make: Leaving directory `/home/work/uClibc-work/SVN/trunk/test'

(the same should happen while building utils)

Any comments ?

Carmelo