tools/release: allow invoking make as a parallel build

If the variable MAKE is set in the environment, use it.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

tools/release

@@ -38,13 +38,16 @@ unset GIT_DIR
 git clone -s -l "$HERE" nasm
 rm -rf nasm/.git nasm/.gitignore
 
+# How to invoke make if MAKE is not set
+MAKE="${MAKE:-make}"
+
 # Create files which are in the release but automatically generated
 cd nasm
 ./autogen.sh
 ./configure --prefix=/usr/local
-make perlreq spec manpages
-make alldeps
-make distclean
+"$MAKE" perlreq spec manpages
+"$MAKE" alldeps
+"$MAKE" distclean
 cd ..
 
 # Clean up any previous attempt
@@ -75,9 +78,9 @@ find nasm-"$version" -not -type d -print > main
 # Create documentation
 cd nasm-"$version"
 ./configure --prefix=/usr/local
-make doc
+"$MAKE" doc
 # Remove intermediate files.
-make cleaner
+"$MAKE" cleaner
 cd ..
 
 # Remove non-documentation