package/slang: fix patch fuzz

Since commit 8f88a644ed7d (support/scripts/apply-patches.sh: set the
maximum fuzz factor to 0), we no longer accept fuzz in patches. Before
8f88a644ed7d was applied, alot of patches were fixed in preparatory
commits, but slang was missed (although the patch has been present since
2017.

Fix the fuzz:
  - leading TABs in Makefile commands
  - fix context

Fixes: 8f88a644ed7d6c9ea55fd4fbe9d7f37055920016
Signed-off-by: Yann E. MORIN <yann.morin@orange.com>
Cc: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/slang/0001-slsh-libs.patch

@@ -12,10 +12,10 @@ Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
 +++ b/slsh/Makefile.in
 @@ -92,7 +92,7 @@
  $(OBJDIR)/slsh_exe: $(OBJDIR)/slsh.o $(OBJDIR)/readline.o
-    $(CC) $(CFLAGS) $(OBJDIR)/slsh.o $(OBJDIR)/readline.o -o $(OBJDIR)/slsh_exe $(LDFLAGS) $(DLINK_FLAGS) $(SRC_LIBS)
+ 	$(CC) $(OBJDIR)/slsh.o $(OBJDIR)/readline.o -o $(OBJDIR)/slsh_exe $(LDFLAGS) $(DLINK_FLAGS) $(SRC_LIBS)
  $(OBJDIR)/slsh: $(OBJDIR)/slsh.o $(OBJDIR)/readline.o
 -	$(CC) $(OBJDIR)/slsh.o $(OBJDIR)/readline.o -o $(OBJDIR)/slsh $(LDFLAGS) $(DLINK_FLAGS) $(INST_LIBS)
 +	$(CC) $(OBJDIR)/slsh.o $(OBJDIR)/readline.o -o $(OBJDIR)/slsh $(LDFLAGS) $(DLINK_FLAGS) $(SRC_LIBS)
  $(OBJDIR)/slsh.o: $(OBJDIR_TSTAMP) slsh.c slsh.h config.h Makefile
-    cd $(OBJDIR) && $(CC) $(SLANG_SRCINC) $(CFLAGS) -c $(DEFS) $(SRCDIR)/slsh.c
+ 	cd $(OBJDIR) && $(CC) $(SLANG_SRCINC) $(CFLAGS) -c $(DEFS) $(SRCDIR)/slsh.c
  $(OBJDIR)/readline.o: $(OBJDIR_TSTAMP) readline.c slsh.h config.h Makefile