build: ensure necessary symlinks created on windows

Bash scripts create and tear down symlinks on Windows. These use the
packages.txt file as input to identify the symlink locations. The
scripts ignored the last line in packages.txt if it didn't end with a
newline. Also, one location was missing. Resolve both issues.

Closes #12422

scripts/windows/create-symlinks.sh

@@ -2,9 +2,9 @@
 
 cd `dirname $0`
 
-while read RAW_PACKAGE
+while read RAW_PACKAGE || [[ -n "$RAW_PACKAGE" ]]
 do
-  PACKAGE=${RAW_PACKAGE: : -1}
+  PACKAGE=${RAW_PACKAGE%$'\r'}
   DESTDIR=./../../modules/\@angular/${PACKAGE}
   mv ${DESTDIR}/facade ${DESTDIR}/facade.old
   cmd <<< "mklink \"..\\..\\modules\\\@angular\\"${PACKAGE}"\\facade\" \"..\\..\\facade\\src\\\""

scripts/windows/packages.txt

@@ -1,3 +1,4 @@
+benchpress/src
 common/src
 compiler/src
 compiler/testing

scripts/windows/remove-symlinks.sh

@@ -2,9 +2,9 @@
 
 cd `dirname $0`
 
-while read RAW_PACKAGE
+while read RAW_PACKAGE || [[ -n "$RAW_PACKAGE" ]]
 do
-  PACKAGE=${RAW_PACKAGE: : -1}
+  PACKAGE=${RAW_PACKAGE%$'\r'}
   DESTDIR=./../../modules/\@angular/${PACKAGE}
   rm ${DESTDIR}/facade
   mv ${DESTDIR}/facade.old ${DESTDIR}/facade