Edit the default target to conform to GNU standards

I've changed all default target names with 'all'. Here there is the explanation: <https://www.gnu.org/prep/standards/standards.html#Standard-Targets>.

examples/makefile

@@ -202,9 +202,9 @@ EXAMPLES = \
     fix_dylib \
 
 
-# typing 'make' will invoke the first target entry in the file,
+# typing 'make' will invoke the default target entry called 'all',
 # in this case, the 'default' target entry is raylib
-default: examples
+all: examples
 
 # compile all examples
 examples: $(EXAMPLES)

templates/advance_game/makefile

@@ -162,9 +162,9 @@ SCREENS = \
 	screens/screen_gameplay.o \
 	screens/screen_ending.o \
 
-# typing 'make' will invoke the first target entry in the file,
+# typing 'make' will invoke the default target entry called 'all',
 # in this case, the 'default' target entry is advance_game
-default: advance_game
+all: advance_game
 
 # compile template - advance_game
 advance_game: advance_game.c $(SCREENS)

templates/basic_game/makefile

@@ -154,9 +154,9 @@ ifeq ($(PLATFORM),PLATFORM_WEB)
     EXT = .html
 endif
 
-# typing 'make' will invoke the first target entry in the file,
+# typing 'make' will invoke the default target entry called 'all',
 # in this case, the 'default' target entry is basic_game
-default: basic_game
+all: basic_game
 
 # compile template - basic_game
 basic_game: basic_game.c

templates/basic_test/makefile

@@ -153,9 +153,9 @@ ifeq ($(PLATFORM),PLATFORM_WEB)
     EXT = .html
 endif
 
-# typing 'make' will invoke the first target entry in the file,
+# typing 'make' will invoke the default target entry called 'all',
 # in this case, the 'default' target entry is basic_test
-default: basic_test
+all: basic_test
 
 # compile template - basic_test
 basic_test: basic_test.c

templates/simple_game/makefile

@@ -154,9 +154,9 @@ ifeq ($(PLATFORM),PLATFORM_WEB)
     EXT = .html
 endif
 
-# typing 'make' will invoke the first target entry in the file,
+# typing 'make' will invoke the default target entry called 'all',
 # in this case, the 'default' target entry is simple_game
-default: simple_game
+all: simple_game
 
 # compile template - simple_game
 simple_game: simple_game.c screens.o

templates/standard_game/makefile

@@ -162,9 +162,9 @@ SCREENS = \
 	screens/screen_gameplay.o \
 	screens/screen_ending.o \
 
-# typing 'make' will invoke the first target entry in the file,
+# typing 'make' will invoke the default target entry called 'all',
 # in this case, the 'default' target entry is standard_game
-default: standard_game
+all: standard_game
 
 # compile template - standard_game
 standard_game: standard_game.c $(SCREENS)