LoongArch: testsuite: Modify the tests to make the test pass.

LoongArch: testsuite: Modify the tests to make the test pass.

Committing r16-3673 cause the test cases in the list to fail.
Make the test pass by modifying the test case or adding compilation
options.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/cmodel-extreme-1.c: Add -fPIC.
	* gcc.target/loongarch/cmodel-extreme-2.c: Likewise.
	* gcc.target/loongarch/tls-gd-noplt.c: Likewise.
	* gcc.target/loongarch/tls-extreme-macro.c: Likewise.
	* gcc.target/loongarch/func-call-medium-2.c: Modify.
	* gcc.target/loongarch/func-call-medium-3.c: Modify.
	* gcc.target/loongarch/func-call-medium-4.c: Removed.