Remove trailing whitespace from Perl files.

Upstream did this in 609b0852e4d50251857dbbac3141ba042e35a9ae and it's
easier to apply patches if we do also.

Change-Id: I5142693ed1e26640987ff16f5ea510e81bba200e
Reviewed-on: https://boringssl-review.googlesource.com/13771
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/crypto/sha/asm/sha256-586.pl b/crypto/sha/asm/sha256-586.pl
index 8f4311b..4400993 100644
--- a/crypto/sha/asm/sha256-586.pl
+++ b/crypto/sha/asm/sha256-586.pl
@@ -40,7 +40,7 @@
 #
 # Performance in clock cycles per processed byte (less is better):
 #
-#		gcc	icc	x86 asm(*)	SIMD	x86_64 asm(**)	
+#		gcc	icc	x86 asm(*)	SIMD	x86_64 asm(**)
 # Pentium	46	57	40/38		-	-
 # PIII		36	33	27/24		-	-
 # P4		41	38	28		-	17.3
@@ -263,7 +263,7 @@
 	&mov	($Coff,"ecx");
 	&mov	($Doff,"edi");
 	&mov	(&DWP(0,"esp"),"ebx");	# magic
-	&mov	($E,&DWP(16,"esi"));	
+	&mov	($E,&DWP(16,"esi"));
 	&mov	("ebx",&DWP(20,"esi"));
 	&mov	("ecx",&DWP(24,"esi"));
 	&mov	("edi",&DWP(28,"esi"));
@@ -372,7 +372,7 @@
 	&xor	($AH[1],"ecx");		# magic
 	&mov	(&DWP(8,"esp"),"ecx");
 	&mov	(&DWP(12,"esp"),"ebx");
-	&mov	($E,&DWP(16,"esi"));	
+	&mov	($E,&DWP(16,"esi"));
 	&mov	("ebx",&DWP(20,"esi"));
 	&mov	("ecx",&DWP(24,"esi"));
 	&mov	("esi",&DWP(28,"esi"));