re PR jit/85384 (libgccjit does not work if --with-gcc-major-version is used)

re PR jit/85384 (libgccjit does not work if --with-gcc-major-version is used)

	PR jit/85384
	* acx.m4 (GCC_BASE_VER): Remove \$\$ from sed expression.

	* configure.ac (gcc-driver-name.h): Honor --with-gcc-major-version
	by using gcc_base_ver to generate a gcc_driver_version, and use
	it when generating GCC_DRIVER_NAME.
	* configure: Regenerate.

	* configure: Regenerate.

From-SVN: r259462