[committed] Fix a few arc tests

[committed] Fix a few arc tests

Similar to others.  Where it's easy to fix the implicit types or add prototypes
I did.  One was just ugly and I didn't want to think too hard, so I just added
-fpermissive.

Pushed to the trunk.

gcc/testsuite
	* gcc.target/arc/lra-1.c: Fix missing prototypes and implicit
	types in variable definitions.
	* gcc.target/arc/pic-1.c: Similarly.
	* gcc.target/arc/pr9001191897.c: Similarly.
	* gcc.target/arc/pr9001195952.c: Add -fpermissive.