Make sure that all globals are internal, except for "start" functions.

tests_lit/llvm2ice_tests/randomize-regalloc.ll

Index: tests_lit/llvm2ice_tests/randomize-regalloc.ll
diff --git a/tests_lit/llvm2ice_tests/randomize-regalloc.ll b/tests_lit/llvm2ice_tests/randomize-regalloc.ll
index 5bdd70d2a4d5d98702debd16a7f1f56a722b8329..51e4b72e980f105c473b58334a43e5c6203cf0d0 100644
--- a/tests_lit/llvm2ice_tests/randomize-regalloc.ll
+++ b/tests_lit/llvm2ice_tests/randomize-regalloc.ll
@@ -17,7 +17,7 @@
 ; RUN:   -randomize-regalloc \
 ; RUN:   | FileCheck %s --check-prefix=OPTM1_123
 
-define <4 x i32> @mul_v4i32(<4 x i32> %a, <4 x i32> %b) {
+define internal <4 x i32> @mul_v4i32(<4 x i32> %a, <4 x i32> %b) {
 entry:
   %res = mul <4 x i32> %a, %b
   ret <4 x i32> %res