oct: Fixes dependencies on uncompressed files

Fix a recent regression that broke the dependencies on uncompressed
files causing files to not be found.
This is also fixing an issue where *.checksum was generated with the
full output from sha256sum instead of only the checksum part, which was
the original intention.

Fixes: 7adb8b9 ("oct: Save all uncompressed files in srcdir")

Signed-off-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>

oct/Makefile.am

@@ -33,25 +33,25 @@ minigzip.c:
 	https://raw.githubusercontent.com/madler/zlib/master/test/$@
 
 .PRECIOUS: %.uncompressed
-empty.uncompressed:
+$(srcdir)/empty.uncompressed:
 	cd $(srcdir) && dd if=/dev/null bs=1k count=1 of=$@
 
-random4k.uncompressed:
+$(srcdir)/random4k.uncompressed:
 	cd $(srcdir) && dd if=/dev/urandom bs=4k count=1 of=$@
 
-random13M.uncompressed:
+$(srcdir)/random13M.uncompressed:
 	cd $(srcdir) && dd if=/dev/urandom bs=1M count=13 of=$@
 
-sparse10M.uncompressed:
+$(srcdir)/sparse10M.uncompressed:
 	cd $(srcdir) && dd if=/dev/urandom bs=1 count=0 seek=10M of=$@
 
-sparse1000M.uncompressed:
+$(srcdir)/sparse1000M.uncompressed:
 	cd $(srcdir) && dd if=/dev/urandom bs=1 count=0 seek=1000M of=$@
 
-zero4k.uncompressed:
+$(srcdir)/zero4k.uncompressed:
 	cd $(srcdir) && dd if=/dev/zero bs=4k count=1 of=$@
 
-zero13M.uncompressed:
+$(srcdir)/zero13M.uncompressed:
 	cd $(srcdir) && dd if=/dev/zero bs=1M count=13 of=$@
 
 
@@ -81,8 +81,8 @@ zero13M.uncompressed:
 
 # Pre-compute the checksum of all files in parallel.
 .PRECIOUS: %.checksum
-%.checksum: %.uncompressed
-	@$(SHA256SUM) $(srcdir)/$? | $(AWK) '{ print $1 }' > $@
+%.checksum: $(srcdir)/%.uncompressed
+	@$(SHA256SUM) $? | $(AWK) '{ print $$1 }' > $@
 
 check-am: all-am
 	$(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS) $(check_SCRIPTS) \

oct/Makefile.in

@@ -1040,25 +1040,25 @@ minigzip.c:
 	https://raw.githubusercontent.com/madler/zlib/master/test/$@
 
 .PRECIOUS: %.uncompressed
-empty.uncompressed:
+$(srcdir)/empty.uncompressed:
 	cd $(srcdir) && dd if=/dev/null bs=1k count=1 of=$@
 
-random4k.uncompressed:
+$(srcdir)/random4k.uncompressed:
 	cd $(srcdir) && dd if=/dev/urandom bs=4k count=1 of=$@
 
-random13M.uncompressed:
+$(srcdir)/random13M.uncompressed:
 	cd $(srcdir) && dd if=/dev/urandom bs=1M count=13 of=$@
 
-sparse10M.uncompressed:
+$(srcdir)/sparse10M.uncompressed:
 	cd $(srcdir) && dd if=/dev/urandom bs=1 count=0 seek=10M of=$@
 
-sparse1000M.uncompressed:
+$(srcdir)/sparse1000M.uncompressed:
 	cd $(srcdir) && dd if=/dev/urandom bs=1 count=0 seek=1000M of=$@
 
-zero4k.uncompressed:
+$(srcdir)/zero4k.uncompressed:
 	cd $(srcdir) && dd if=/dev/zero bs=4k count=1 of=$@
 
-zero13M.uncompressed:
+$(srcdir)/zero13M.uncompressed:
 	cd $(srcdir) && dd if=/dev/zero bs=1M count=13 of=$@
 
 %.uncompressed: %.source download.sh config.sh
@@ -1086,8 +1086,8 @@ zero13M.uncompressed:
 
 # Pre-compute the checksum of all files in parallel.
 .PRECIOUS: %.checksum
-%.checksum: %.uncompressed
-	@$(SHA256SUM) $(srcdir)/$? | $(AWK) '{ print $1 }' > $@
+%.checksum: $(srcdir)/%.uncompressed
+	@$(SHA256SUM) $? | $(AWK) '{ print $$1 }' > $@
 
 check-am: all-am
 	$(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS) $(check_SCRIPTS) \