javaPackages: add upgraded packages

These are packages required to build Sourcetrail Java support

- maven-compiler-plugin 3.2
- plexus-compiler-api 2.4
- plexus-compiler-javac 2.4
- plexus-compiler-manager 2.4

pkgs/development/java-modules/maven/compiler-plugin.nix

@@ -0,0 +1,14 @@
+{ fetchMaven }:
+
+{
+  mavenCompiler_3_2 = map (obj: fetchMaven {
+    version = "3.2";
+    artifactId = "maven-compiler-plugin";
+    groupId = "org.apache.maven.plugins";
+    sha512 = obj.sha512;
+    type = obj.type;
+  }) [
+    { type = "jar"; sha512 = "15lncacbgsbkp6m4fb1hv41nxn0w8lxgpjcpghw3znbh909d2y5h70q2nw3fyhd7kqsjwpvwpilkgyd5b35vi1smj5hhapmakqjk28r"; }
+    { type = "pom"; sha512 = "0a9pnb9rscsc32gpjr257k1pnydpskcs4jx8bs88vikxbdgc5sppllmqhi7k00i19azy2vjj59b3m9dcklcspmy9caxv2l7vjyr2lm0"; }
+  ];
+}