cc/gcc: do not consume parameters when parsing them

The current construct consumes the parameters while we parse them.
Change this to a construct that does not consume the parameters.

This has no impact on gcc, but is done for homogeneity with other
components (eg. glibc).

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

 # Default test suite configuration

 # Default DejaGnu configuration

 DG_TOOLNAME = gcc

 DG_TARGET_HOSTNAME = 127.0.0.1

 DG_TARGET_USERNAME = root

 # Default tests

 DG_C_TESTS = 

 DG_CPP_TESTS =