Darwin, testsuite: Adjust indirect thunk tests for default flags.

Darwin, testsuite: Adjust indirect thunk tests for default flags.

Darwin mandates an indirection for variables in the commmon
section.  Since the change to -fno-common, variables in some
of the thunk tests are now in the .data section where they
may be accessed directly.  Remove the indirections from the
scan-assembler matches.

gcc/testsuite/ChangeLog:

2020-04-12  Iain Sandoe  <iain@sandoe.co.uk>

	* gcc.target/i386/indirect-thunk-1.c: Adjust for fno-common
	change, removing indirections for vars in .data.
	* gcc.target/i386/indirect-thunk-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.