all: fix wildcard to work with make-4.x

In make-3.8x, the $(wildacrd) function would sort the entries,
while in make-4.x, it would just return the entries in any
unpredictable order [*]

Use the $(sort) function to get reproducible behaviour.

[*] Well, most probably the roder the entries appear when read
from readdir()

Reported-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Tested-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>

CT_EXPERIMENTAL=y

CT_LOCAL_TARBALLS_DIR="${HOME}/src"

CT_SAVE_TARBALLS=y

CT_LOG_EXTRA=y

CT_ARCH_CPU="ev56"

CT_ARCH_TUNE="ev56"

CT_ARCH_ALPHA_EV67=y

CT_KERNEL_linux=y

CT_KERNEL_V_2_6_38=y

CT_BINUTILS_V_2_21_1a=y

CT_CC_V_4_3_5=y

CT_CC_LANG_FORTRAN=y

CT_CC_LANG_CXX=y

# CT_CC_GCC_ENABLE_TARGET_OPTSPACE is not set

CT_LIBC_glibc=y

CT_LIBC_GLIBC_V_2_13=y

CT_LIBC_EXTRA_CC_ARGS="-Wl,--no-relax"

CT_LIBC_GLIBC_USE_PORTS=y

CT_GMP_V_5_0_1=y

CT_MPFR_V_3_0_0=y