testsuite: fix 'dg-do-compile' typos

We want 'dg-do compile', not 'dg-do-compile'. Fix that.

	PR target/69194
	PR c++/92024
	PR c++/110057
	* c-c++-common/Wshadow-1.c: Fix 'dg-do compile' typo.
	* g++.dg/tree-ssa/devirt-array-destructor-1.C: Likewise.
	* g++.dg/tree-ssa/devirt-array-destructor-2.C: Likewise.
	* gcc.target/arm/pr69194.c: Likewise.