[BOLT] Exit on parseLSDA errors

[Amir]

Summary

Replace assertions with checking and error reporting.

bolt/lib/Core/Exceptions.cpp

while (CallSitePtr < CallSiteTableEnd) {
     uint64_t LPOffset = LPStart + LandingPad;
     uint64_t LPAddress = Address + LPOffset;
 
     // Verify if landing pad code is located outside current function
     // Support landing pad to builtin_unreachable
     if (LPAddress < Address || LPAddress > Address + getSize()) {
       BinaryFunction *Fragment =
           BC.getBinaryFunctionContainingAddress(LPAddress);
-      assert(Fragment != nullptr &&
-             "BOLT-ERROR: cannot find landing pad fragment");
+      if (Fragment == nullptr) {
+        errs() << formatv(
+            "BOLT-ERROR: cannot find function for landing pad {0:x}\n",
+            LPAddress);
+        exit(1);
+      }
       BC.addInterproceduralReference(this, Fragment->getAddress());
       BC.processInterproceduralReferences();
-      assert(isParentOrChildOf(*Fragment) &&
-             "BOLT-ERROR: cannot have landing pads in different functions");
+      if (!isParentOrChildOf(*Fragment)) {
+        errs() << formatv("BOLT-ERROR: {0} has landing pad in {1}\n", *this,
+                          *Fragment);
+        exit(1);
+      }
       setHasIndirectTargetToSplitFragment(true);
       BC.addFragmentsToSkip(this);
       return;
     }
 
     if (opts::PrintExceptions) {
       outs() << "Call Site: [0x" << Twine::utohexstr(RangeBase + Start)
              << ", 0x" << Twine::utohexstr(RangeBase + Start + Length)