generated R.java causes maven-compiler to recompile 3.x to recompile the whole source tree instead of just the R.java even though R.java did not change at all

What steps will reproduce the problem?
1. Create an Android project using both android-maven-plugin 3.5.1 and 
maven-compiler-plugin 3.0.
2. Add some resources under /res
3. Compile project using mvn compile.
4. Given no modification is done to either /res or /src files, run mvn compile 
again.

What is the expected output?

http://maven-android-plugin-m2site.googlecode.com/svn/generate-sources-mojo.html
 should not regenerate R.java given nothing changed.

maven-compiler-plugin:compile should not compile any new classes at all given 
all /target/classes still match their /src and /target/generated-sources/r last 
used .java files. 

What do you see instead?

maven-android-plugin:generate-sources creates a new R.java with the same 
content and new timestamp.
maven-compiler-plugin:compile shows it detected source changes and is 
recompiling whole source tree.

What version of maven-android-plugin are you using?

3.5.1

What are the complete output lines of "mvn -version" on your machine?

Apache Maven 3.0.4 (r1232337; 2012-01-17 03:44:56-0500)
Maven home: /usr/share/maven
Java version: 1.6.0_37, vendor: Apple Inc.
Java home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
Default locale: en_US, platform encoding: MacRoman
OS name: "mac os x", version: "10.7.5", arch: "x86_64", family: "mac"

Please provide any additional information below.

Original issue reported on code.google.com by roberto.andrade on 1 Mar 2013 at 8:22

kerasking / maven-android-plugin

generated R.java causes maven-compiler to recompile 3.x to recompile the whole source tree instead of just the R.java even though R.java did not change at all #358