Makefile.am: Add explicit openssl directory to pppd include path

When configured with an explicit (non-default) path to the openssl
libraries, we need to add an appropriate -I option when compiling pppd
code so that it can find the openssl header files.

Signed-off-by: Paul Mackerras <[email protected]>

pppd/Makefile.am

@@ -177,6 +177,8 @@ noinst_LTLIBRARIES = libppp_crypto.la
 libppp_crypto_la_SOURCES=crypto.c ppp-md5.c ppp-md4.c ppp-sha1.c ppp-des.c
 
 if PPP_WITH_OPENSSL
+pppd_CPPFLAGS += $(OPENSSL_INCLUDES)
+
 libppp_crypto_la_CPPFLAGS=$(OPENSSL_INCLUDES)
 libppp_crypto_la_LDFLAGS=$(OPENSSL_LDFLAGS)
 libppp_crypto_la_LIBADD=$(OPENSSL_LIBS)