RFR: JDK-8075140: Solaris build of native libraries not consistently using EXTRA_CFLAGS and EXTRA_LDFLAGS

[Erik Joelsson]

Hello,

While working on the new Hotspot makefiles in build-infra I noticed this 
problem. When introducing devkits for Solaris, we rely on the variables 
EXTRA_CFLAGS, EXTRA_CXXFLAGS and EXTRA_LDFLAGS to propagate the SYSROOT 
specific flags into the hotspot build. However, these flags aren't 
consistently used in the Hotspot build for all the native libraries.

This patch adds the variables to all missing compile and link command 
lines. It also fixes an issue with saproc.so where the debug info was 
created off one of the object files instead of the library.

Bug: https://bugs.openjdk.java.net/browse/JDK-8075140
Webrev: http://cr.openjdk.java.net/~erikj/8075140/webrev.hotspot.01/

/Erik