Makefile: Expand wildcard

[bunder]

Without this patch build fails with following error:

make: *** No rule to make target 'ddterm/app/icons/*', needed by '.../ddterm@amezin.github.com/ddterm/app/icons/*'.  Stop.

[amezin]

Weird. It builds successfully on my machine and in CI.

I can trigger this error only when ddterm/app/icons/ is empty. But it shouldn't be empty.

Oh, it also happens when installing system-wide, I see

[bunder]

ddterm/app/icons is not empty on my machine. I have somewhat standard setup: Arch Linux, x86_64, bash, GNU Make 4.4.1.

But you're right: make should expand wildcards automatically, when they are used in rules. I don't know why this doesn't work.

[amezin]

But you're right: make should expand wildcards automatically, when they are used in rules. I don't know why this doesn't work.

At least for system-wide "make install", it happens because

SYS_INSTALLED_CONTENT := $(addprefix $(SYS_INSTALLED_FULL_PREFIX)/,$(PACK_CONTENT))

Wildcards won't work for "destination" files obviously