Fixes for compiler wrappers and cmake config file dirs. (#5361)

* h5cc: Fix location of settings and pkgconfig files

In h5cc and other compiler wrappers, drop hardcoded 'lib' as the dir for
libhdf5.settings and pkgconfig scripts and use cmake computed values for
HDF5_INSTALL_LIB_DIR. This fixes issues on systems where the libdir is
'lib64' for instance, as on 64-bit Linux OSes, and 'lib' in the
wrappers point to incorrect locations of the settings and pkgconfig
files.

* h5cc: Drop -show from output when calling command.

When calling `h5cc -show FOO`, the output should not repeat the '-show'
argument itself. This commit fixes the '-show' command invoked from a
cmake built h5cc to be consistent with an (previously) autotools built
one.

config/cmake/libh5cc.in

@@ -32,7 +32,7 @@ pc_args=""
 # libhdf5.settings file residing in the lib directory.
 showconfigure()
 {
-  cat $dir/lib/libhdf5.settings
+  cat $dir/@HDF5_INSTALL_LIB_DIR@/libhdf5.settings
   status=$?
 }
 
@@ -57,7 +57,7 @@ usage() {
   exit $EXIT_FAILURE
 }
 
-export PKG_CONFIG_PATH=$dir/lib/pkgconfig
+export PKG_CONFIG_PATH=$dir/@HDF5_INSTALL_LIB_DIR@/pkgconfig
 
 for arg in $@ ; do
   case "$arg" in
@@ -66,7 +66,7 @@ for arg in $@ ; do
       exit $status
       ;;
     -show)
-      echo @_PKG_CONFIG_COMPILER@ $@ `pkg-config $pc_args --define-variable=prefix=$dir --cflags --libs @_PKG_CONFIG_LIBNAME@`
+      echo @_PKG_CONFIG_COMPILER@ ${@:2} `pkg-config $pc_args --define-variable=prefix=$dir --cflags --libs @_PKG_CONFIG_LIBNAME@`
       exit $status
       ;;
     -help)