[MC,ARM] Change a report_fatal_error to reportError

Similar to other "unsupported relocation type" diagnostics, we don't
report the internal fixup name.

Author: MaskRay

llvm/lib/Target/ARM/MCTargetDesc/ARMWinCOFFObjectWriter.cpp

@@ -61,8 +61,8 @@ unsigned ARMWinCOFFObjectWriter::getRelocType(MCContext &Ctx,
 
   switch (FixupKind) {
   default: {
-    const MCFixupKindInfo &Info = MAB.getFixupKindInfo(Fixup.getKind());
-    report_fatal_error(Twine("unsupported relocation type: ") + Info.Name);
+    Ctx.reportError(Fixup.getLoc(), "unsupported relocation type");
+    return COFF::IMAGE_REL_ARM_ABSOLUTE;
   }
   case FK_Data_4:
     switch (Modifier) {

llvm/test/MC/ARM/Windows/invalid-relocation.s

@@ -1,4 +1,4 @@
-# RUN: not --crash llvm-mc -triple thumbv7-windows -incremental-linker-compatible -filetype obj -o /dev/null 2>&1 %s \
+# RUN: not llvm-mc -triple thumbv7-windows -incremental-linker-compatible -filetype obj -o /dev/null 2>&1 %s \
 # RUN:     | FileCheck %s
 
 	.def invalid_relocation
@@ -9,5 +9,4 @@
 	.thumb_func
 	adr r0, invalid_relocation+1
 
-# CHECK: LLVM ERROR: unsupported relocation type: fixup_t2_adr_pcrel_12
-
+# CHECK: 10:2: error: unsupported relocation type