*-symbol-check: use correct nm path when cross-compiling

Inspired-by: a similar patch for libdrm by Heiko Becker
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

src/mapi/es2api/ABI-check

@@ -23,7 +23,7 @@ then
   exit 1
 fi
 
-FUNCS=$(nm -D --defined-only $LIB | grep -o 'T gl.*' | cut -c 3- | while read func; do
+FUNCS=$($NM -D --defined-only $LIB | grep -o 'T gl.*' | cut -c 3- | while read func; do
 ( grep -q "^$func$" || echo $func )  <<EOF
 glActiveShaderProgram
 glActiveTexture

src/mapi/es2api/meson.build

@@ -55,6 +55,7 @@ if with_tests
   test(
     'es2-ABI-check',
     find_program('ABI-check'),
+    env : env_test,
     args : libgles2
   )
 endif