nodejs: Build only when meta-py2 is included

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/nodejs/nodejs_10.17.0.bb

@@ -6,7 +6,7 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=be980eb7ccafe287cb438076a65e888c"
 DEPENDS = "openssl"
 DEPENDS_append_class-target = " nodejs-native"
 
-inherit pkgconfig python3native
+inherit pkgconfig pythonnative
 
 COMPATIBLE_MACHINE_armv4 = "(!.*armv4).*"
 COMPATIBLE_MACHINE_armv5 = "(!.*armv5).*"
@@ -148,3 +148,8 @@ FILES_${PN}-systemtap = "${datadir}/systemtap"
 
 
 BBCLASSEXTEND = "native"
+
+python() {
+    if 'meta-python2' not in d.getVar('BBFILE_COLLECTIONS').split():
+        raise bb.parse.SkipRecipe('Requires meta-python2 to be present.')
+}