testsuite: i386: Fix gcc.target/i386/pr95798-?.c on Solaris

testsuite: i386: Fix gcc.target/i386/pr95798-?.c on Solaris

The new gcc.target/i386/pr95798-?.c tests FAIL on 64-bit Solaris/x86:

+FAIL: gcc.target/i386/pr95798-1.c scan-assembler 1,
8\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-1.c scan-assembler 2,
16\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-1.c scan-assembler 3,
24\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-1.c scan-assembler 4,
32\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-1.c scan-assembler 5,
40\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-1.c scan-assembler 6,
48\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-1.c scan-assembler 7,
56\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-2.c scan-assembler 1,
8\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-2.c scan-assembler 2,
16\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-2.c scan-assembler 3,
24\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-2.c scan-assembler 4,
32\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-2.c scan-assembler 5,
40\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-2.c scan-assembler 6,
48\\\\(%rsp,%r[a-z0-9]*,8\\\\)
+FAIL: gcc.target/i386/pr95798-2.c scan-assembler 7,
56\\\\(%rsp,%r[a-z0-9]*,8\\\\)

This happens because Solaris/amd64 defaults to -fno-omit-frame-pointer
and can be avoided by always passing -fomit-frame-pointer.

Tested on i386-pc-solaris2.11 and x86_64-pc-linux-gnu.

2021-03-02  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	gcc/testsuite:
	* gcc.target/i386/pr95798-1.c: Add -fomit-frame-pointer to
	dg-options.
	* gcc.target/i386/pr95798-2.c: Likewise.