esl-php: Create installation directories if they do not exist (+ other minor clean ups).

Fixes:

   cp ESL.so /var/tmp/por.../image/usr/lib64/php5.3/lib/extensions/no-debug-zts-20090626
   cp: cannot create regular file `/var/tmp/por.../image/usr/lib64/php5.3/lib/extensions/no-debug-zts-20090626': No such file or directory
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>

libs/esl/php/Makefile

+PHP=php
+PHP_CONFIG=php-config
+
+PHP_LDFLAGS=$(shell $(PHP_CONFIG) --ldflags)
+PHP_LIBS=$(shell $(PHP_CONFIG) --libs | sed -r 's/ ?-l(bz2|pcre|xml2|gssapi_krb5|krb5|k5crypto|com_err|history|z|readline|gmp|ssl|crypto)//g')
+PHP_EXT_DIR=$(shell $(PHP_CONFIG) --extension-dir)
+PHP_INC_DIR=$(shell $(PHP) -r 'echo ini_get("include_path");' | cut -d: -f2)
+PHP_INI_DIR=$(shell $(PHP_CONFIG) --configure-options | tr " " "\n" | grep -- --with-config-file-scan-dir | cut -f2 -d=)
+
 LOCAL_CFLAGS=$(shell php-config --includes)
-PHP_LDFLAGS=$(shell php-config --ldflags)
-PHP_LIBS=$(shell php-config --libs | sed -r 's/ ?-l(bz2|pcre|xml2|gssapi_krb5|krb5|k5crypto|com_err|history|z|readline|gmp|ssl|crypto)//g')
 LOCAL_LDFLAGS=$(PHP_LDFLAGS) $(PHP_LIBS)
 LOCAL_LDFLAGS+=-lpthread
+
 WRAP_GCC_WARNING_SILENCE=-Wno-unused-label -Wno-unused-function
 
 all: ESL.so
@@ -25,6 +33,9 @@ swigclean:
 reswig:	swigclean esl_wrap.cpp
 
 install: ESL.so
-	cp ESL.so $(DESTDIR)/$(shell php-config --extension-dir)
-	cp ESL.php /$(DESTDIR)/$(shell php -r 'echo ini_get("include_path");' | cut -d: -f2)
-	echo 'extension=ESL.so' >> $(DESTDIR)/$(shell php-config --configure-options | tr " " "\n" | grep -- --with-config-file-scan-dir | cut -f2 -d=)/esl.ini
+	test -d "$(DESTDIR)$(PHP_EXT_DIR)" || mkdir -p "$(DESTDIR)$(PHP_EXT_DIR)"
+	cp ESL.so "$(DESTDIR)$(PHP_EXT_DIR)"
+	test -d "$(DESTDIR)$(PHP_INC_DIR)" || mkdir -p "$(DESTDIR)$(PHP_INC_DIR)"
+	cp ESL.php "$(DESTDIR)$(PHP_INC_DIR)"
+	test -d "$(DESTDIR)$(PHP_INI_DIR)" || mkdir -p "$(DESTDIR)$(PHP_INI_DIR)"
+	test -f "$(DESTDIR)$(PHP_INI_DIR)/esl.ini" || echo 'extension=ESL.so' > "$(DESTDIR)$(PHP_INI_DIR)/esl.ini"