install scripts for boost and petsc corrected again

tools/install_boost.sh

@@ -19,7 +19,7 @@ if [ ! -d ${INSTALL_PREFIX}/boost ]; then
   curl -SL "http://netcologne.dl.sourceforge.net/project/boost/boost/${BOOST_VERSION}/${BOOST_FILENAME}" \
     | tar --strip-components=1 -xzC ${BUILD_DIR}
   cd ${BUILD_DIR}
-  ./bootstrap.sh --prefix=${INSTALL_PREFIX}/boost/${BOOST_VERSION}/ \
+  ./bootstrap.sh --prefix=${INSTALL_PREFIX}/boost \
                  --with-libraries=system,iostreams,filesystem,program_options,date_time,test
   ./b2 -s NO_BZIP2=1 cxxflags="-std=c++11" --build-type=minimal variant=release -j 4 install
   rm -rf ${BUILD_DIR}

tools/install_petsc.sh

@@ -20,7 +20,7 @@ if [ ! -d ${INSTALL_PREFIX}/petsc ]; then
     | tar --strip-components=1 -xzC ${BUILD_DIR}
    cd ${BUILD_DIR}
    # minimal petsc configuration, just for test purposes
-   ./configure --prefix=${INSTALL_PREFIX}/petsc/${PETSC_VERSION}/ --with-pic=1 \
+   ./configure --prefix=${INSTALL_PREFIX}/petsc --with-pic=1 \
                --with-clanguage=c++ --with-debugging=0 \
                --with-metis=1       --download-metis=yes \
                --with-parmetis=1    --download-parmetis=yes \