depends: always configure with --with-pic

We currently do this sporadically. Not only amongst packages, but across
OS's, i.e sometimes it's done for BSDs/Android, and sometimes not.

Configure with `--with-pic` globally instead. I think this generally
makes more sense, and should not have any downsides.

See related discussion in
https://github.com/bitcoin/bitcoin/pull/28846#discussion_r1399123100.

depends/packages/qrencode.mk

@@ -8,8 +8,6 @@ define $(package)_set_vars
 $(package)_config_opts=--disable-shared --without-tools --without-tests --without-png
 $(package)_config_opts += --disable-gprof --disable-gcov --disable-mudflap
 $(package)_config_opts += --disable-dependency-tracking --enable-option-checking
-$(package)_config_opts_linux=--with-pic
-$(package)_config_opts_android=--with-pic
 $(package)_cflags += -Wno-int-conversion -Wno-implicit-function-declaration
 endef