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ads2gas_apple.pl: Reduce differences to ads2gas.pl

Avoid substitution of substrings by using \b to make sure the
substituted strings are at word boundaries.

This is an adaption of the corresponding changes to ads2gas.pl
from 7ebcaeb0fa.

Change-Id: I52160e8ba0373d4779d5fc3b0c384ca5c51c7b13

--- a/build/make/ads2gas_apple.pl

+++ b/build/make/ads2gas_apple.pl

@@ -75,16 +75,16 @@

     s/:SHR:/ >> /g;

     # Convert ELSE to .else

-    s/ELSE/.else/g;

+    s/\bELSE\b/.else/g;

     # Convert ENDIF to .endif

-    s/ENDIF/.endif/g;

+    s/\bENDIF\b/.endif/g;

     # Convert ELSEIF to .elseif

-    s/ELSEIF/.elseif/g;

+    s/\bELSEIF\b/.elseif/g;

     # Convert LTORG to .ltorg

-    s/LTORG/.ltorg/g;

+    s/\bLTORG\b/.ltorg/g;

     # Convert IF :DEF:to .if

     # gcc doesn't have the ability to do a conditional

@@ -164,7 +164,7 @@

     s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/;

     # ALIGN directive

-    s/ALIGN/.balign/g;

+    s/\bALIGN\b/.balign/g;

     # Strip ARM

     s/\sARM/@ ARM/g;

@@ -184,7 +184,7 @@

     s/(.*)EQU(.*)/.set $1, $2/;

     # Begin macro definition

-    if (/MACRO/)

+    if (/\bMACRO\b/)

     {

         # Process next line down, which will be the macro definition

         $_ = <STDIN>;

@@ -215,7 +215,7 @@

     # For macros, use \ to reference formal params

 #   s/\$/\\/g;                  # End macro definition

-    s/MEND/.endm/;              # No need to tell it where to stop assembling

+    s/\bMEND\b/.endm/;              # No need to tell it where to stop assembling

     next if /^\s*END\s*$/;

     # Clang used by Chromium differs slightly from clang in XCode in what it