Handle build-trees better.

Properly create git revision and source file sha1sums include files when
building tor not in its source tree but in a dedicated build tree.

src/common/Makefile.am

@@ -56,9 +56,9 @@ noinst_HEADERS = 				\
 
 common_sha1.i: $(libor_SOURCES) $(libor_crypto_a_SOURCES) $(noinst_HEADERS)
 	if test "@SHA1SUM@" != none; then \
-	  @SHA1SUM@ $(libor_SOURCES) $(libor_crypto_a_SOURCES) $(noinst_HEADERS) | @SED@ -n 's/^\(.*\)$$/"\1\\n"/p' > common_sha1.i; \
+	  (cd "$(srcdir)" && @SHA1SUM@ $(libor_SOURCES) $(libor_crypto_a_SOURCES) $(noinst_HEADERS)) | @SED@ -n 's/^\(.*\)$$/"\1\\n"/p' > common_sha1.i; \
 	elif test "@OPENSSL@" != none; then \
-	  @OPENSSL@ sha1 $(libor_SOURCES) $(libor_crypto_a_SOURCES) $(noinst_HEADERS) | @SED@ -n 's/SHA1(\(.*\))= \(.*\)/"\2  \1\\n"/p' > common_sha1.i; \
+	  (cd "$(srcdir)" && @OPENSSL@ sha1 $(libor_SOURCES) $(libor_crypto_a_SOURCES) $(noinst_HEADERS)) | @SED@ -n 's/SHA1(\(.*\))= \(.*\)/"\2  \1\\n"/p' > common_sha1.i; \
 	else \
 	  rm common_sha1.i; \
 	  touch common_sha1.i; \

src/or/Makefile.am

@@ -126,8 +126,9 @@ tor_main.o: micro-revision.i
 
 micro-revision.i: FORCE
 	@rm -f micro-revision.tmp;					\
-	if test -d ../../.git && test -x "`which git 2>&1;true`"; then 	\
-	  HASH="`git rev-parse --short=16 HEAD`"; 			\
+	if test -d "$(top_srcdir)/.git" &&				\
+	  test -x "`which git 2>&1;true`"; then				\
+	  HASH="`cd "$(top_srcdir)" && git rev-parse --short=16 HEAD`"; 	\
 	  echo \"$$HASH\" > micro-revision.tmp; 			\
         fi;								\
 	if test ! -f micro-revision.tmp ; then				\
@@ -141,10 +142,10 @@ micro-revision.i: FORCE
 
 or_sha1.i: $(tor_SOURCES) $(libtor_a_SOURCES)
 	if test "@SHA1SUM@" != none; then \
-	  @SHA1SUM@ $(tor_SOURCES) $(libtor_a_SOURCES) | \
+	  (cd "$(srcdir)" && @SHA1SUM@ $(tor_SOURCES) $(libtor_a_SOURCES)) | \
 	  @SED@ -n 's/^\(.*\)$$/"\1\\n"/p' > or_sha1.i; \
 	elif test "@OPENSSL@" != none; then \
-	  @OPENSSL@ sha1 $(tor_SOURCES) $(libtor_a_SOURCES) | \
+	  (cd "$(srcdir)" && @OPENSSL@ sha1 $(tor_SOURCES) $(libtor_a_SOURCES)) | \
 	  @SED@ -n 's/SHA1(\(.*\))= \(.*\)/"\2  \1\\n"/p' > or_sha1.i; \
 	else \
 	  rm or_sha1.i; \