[llvm] [BOLT][NFC] Add tests with multiple CUs (PR #93615)

[Sayhaan Siddiqui via llvm-commits]

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@@ -0,0 +1,385 @@
+# clang++ -fbasic-block-sections=all -ffunction-sections -g2 -gdwarf-5
+# int doStuffOther(int val) {
+#   if (val)
+#     ++val;
+#   return val;
+# }
+#
+# int mainOther(int argc, const char** argv) {
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sayhaan wrote:

Regenerated .s to make sure it's the correct ASM.

https://github.com/llvm/llvm-project/pull/93615