sun/management/jmxremote/bootstrap/CustomLauncherTest.java should be updated for jdk8 removal of solaris-32bit support

While this test is changing to java version via JDK-8004926, new issues found:

1. Test should be update for jdk8 removal of solaris-32bit support. It uses "sparc" instead of "sparcv9"

       58 if [ "$OS" = "SunOS" ]; then
       59 PLATFORM=solaris
       60 case "`uname -p`" in
       61 i[3-9]86)
       62 ARCH=i586
       63 ;;
       64 sparc)
       65 ARCH=sparc
       66 ;;
       67 esac

       85 if [ "$ARCH" = "i586" ]; then
       86 LIBARCH="i386"
       87 else
       88 LIBARCH=$ARCH
       89 fi

and try to locate libjvm.so under ${LIBARCH}

2. If the bootstrap/solaris-sparc/launcher have no execute permission, test will silently pass
...
command: shell CustomLauncherTest.sh
reason: User specified action: run shell CustomLauncherTest.sh
elapsed time (seconds): 0.042
STDOUT:
.../test/sun/management/jmxremote/bootstrap/solaris-sparc/launcher not found
...
Test results: passed: 1

Above "launcher" exist, but without execute permission