Fix a regression caused by:

vargaz · vargaz · commit 6aa74ae5723b · 2017-07-20T18:10:42.000-04:00
commit 975e3a6 Author: Zoltan Varga <vargaz@gmail.com> Date: Mon May 1 04:01:22 2017 -0400 Align the size of the Mono EH table to 8 to prevent an ld assertion. Fixes #55553. The align instruction was emitted too early increasing the size of last entry of the EH table. Also, it was aligned to 256 (2^8) instead of 8. Fixes #58264.
diff --git a/lib/CodeGen/AsmPrinter/DwarfMonoException.cpp b/lib/CodeGen/AsmPrinter/DwarfMonoException.cpp
@@ -623,9 +623,9 @@ void DwarfMonoException::EmitMonoEHFrame(const Function *Personality)
       Streamer.AddBlankLine();
   }
 
-  Asm->EmitAlignment(8);
-
   Streamer.EmitLabel(EHFrameEndSym);
+
+  Asm->EmitAlignment(3);
 }
 
 DwarfMonoException::DwarfMonoException(AsmPrinter *A)

Original file line number	Diff line number	Diff line change
`@@ -623,9 +623,9 @@ void DwarfMonoException::EmitMonoEHFrame(const Function *Personality)`
`623`	`623`	`Streamer.AddBlankLine();`
`624`	`624`	`}`
`625`	`625`
`626`		`- Asm->EmitAlignment(8);`
`627`		`-`
`628`	`626`	`Streamer.EmitLabel(EHFrameEndSym);`
	`627`	`+`
	`628`	`+ Asm->EmitAlignment(3);`
`629`	`629`	`}`
`630`	`630`
`631`	`631`	`DwarfMonoException::DwarfMonoException(AsmPrinter *A)`