[patch] gcn: Add missing space to ASM_SPEC in gcn-hsa.h

[Tobias Burnus <tburnus@baylibre.com>]

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This patch avoids assembler warnings for gfx908 and gfx90a such as
   '-xnack-mattr=-sramecc' is not a recognized feature for this target(ignoring feature)
as we pass   -mattr=-xnack-mattr=-sramecc  to the llvm-mc assembler.

Solution: Add a space before the second '-mattr='.

OK for mainline?

Tobias

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gcn: Add missing space to ASM_SPEC in gcn-hsa.h

gcc/
	* config/gcn/gcn-hsa.h (ASM_SPEC): Add space after -mxnack= argument.

diff --git a/gcc/config/gcn/gcn-hsa.h b/gcc/config/gcn/gcn-hsa.h
index bf7079fbbc6..f5de0d2969f 100644
--- a/gcc/config/gcn/gcn-hsa.h
+++ b/gcc/config/gcn/gcn-hsa.h
@@ -89,7 +89,7 @@ extern unsigned int gcn_local_sym_hash (const char *name);
 #define ASM_SPEC  "-triple=amdgcn--amdhsa "  \
 		  "%{march=*:-mcpu=%*} " \
 		  "%{!march=*|march=fiji:--amdhsa-code-object-version=3} " \
-		  "%{" NO_XNACK XNACKOPT "}" \
+		  "%{" NO_XNACK XNACKOPT "} " \
 		  "%{" NO_SRAM_ECC SRAMOPT "} " \
 		  "%{march=gfx1030|march=gfx1100:-mattr=+wavefrontsize64} " \
 		  "-filetype=obj"