Separated standard function to standard_build and standard_install.

  * standard_build invoke configure and make. It not invoke `make install`.
  * standard_install invoke only `make install`.
  * Added backword compatibility function for above separation.
  * Added new function for bundled_gems support named standard_install_with_bundled_gems.

bin/ruby-build

@@ -531,7 +531,7 @@ build_package_warn_unsupported() {
   } >&3
 }
 
-build_package_standard() {
+build_package_standard_build() {
   local package_name="$1"
 
   if [ "${MAKEOPTS+defined}" ]; then
@@ -548,8 +548,6 @@ build_package_standard() {
   local PACKAGE_CONFIGURE_OPTS_ARRAY="${package_var_name}_CONFIGURE_OPTS_ARRAY[@]"
   local PACKAGE_MAKE_OPTS="${package_var_name}_MAKE_OPTS"
   local PACKAGE_MAKE_OPTS_ARRAY="${package_var_name}_MAKE_OPTS_ARRAY[@]"
-  local PACKAGE_MAKE_INSTALL_OPTS="${package_var_name}_MAKE_INSTALL_OPTS"
-  local PACKAGE_MAKE_INSTALL_OPTS_ARRAY="${package_var_name}_MAKE_INSTALL_OPTS_ARRAY[@]"
   local PACKAGE_CFLAGS="${package_var_name}_CFLAGS"
 
   if [ "$package_var_name" = "RUBY" ]; then
@@ -566,18 +564,33 @@ build_package_standard() {
       $CONFIGURE_OPTS ${!PACKAGE_CONFIGURE_OPTS} "${!PACKAGE_CONFIGURE_OPTS_ARRAY}" || return 1
   ) >&4 2>&1
 
-
   { "$MAKE" $MAKE_OPTS ${!PACKAGE_MAKE_OPTS} "${!PACKAGE_MAKE_OPTS_ARRAY}"
   } >&4 2>&1
+}
+
+build_package_standard_install() {
+  local package_name="$1"
+  local package_var_name="$(capitalize "${package_name%%-*}")"
+
+  local PACKAGE_MAKE_INSTALL_OPTS="${package_var_name}_MAKE_INSTALL_OPTS"
+  local PACKAGE_MAKE_INSTALL_OPTS_ARRAY="${package_var_name}_MAKE_INSTALL_OPTS_ARRAY[@]"
 
-  if [ "$package_name" == "ruby-trunk" ]; then
+  { "$MAKE" install $MAKE_INSTALL_OPTS ${!PACKAGE_MAKE_INSTALL_OPTS} "${!PACKAGE_MAKE_INSTALL_OPTS_ARRAY}"
+  } >&4 2>&1
+}
+
+build_package_standard_install_with_bundled_gems() {
   { "$MAKE" update-gems
     "$MAKE" extract-gems
   } >&4 2>&1
-  fi
 
-  { "$MAKE" install $MAKE_INSTALL_OPTS ${!PACKAGE_MAKE_INSTALL_OPTS} "${!PACKAGE_MAKE_INSTALL_OPTS_ARRAY}"
-  } >&4 2>&1
+  build_package_standard_install
+}
+
+# Backword Compatibility for standard function
+build_package_standard() {
+  build_package_standard_build
+  build_package_standard_install
 }
 
 build_package_autoconf() {