Bug#887749: pymca FTBFS with glibc 2.26

[Adrian Bunk]

Source: pymca
Version: 5.2.2+dfsg-1
Severity: serious

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/pymca.html

...
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -g -O2 -fdebug-prefix-map=/build/1st/pymca-5.2.2+dfsg=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -D_GNU_SOURCE=1 -IPyMca5/PyMcaIO/specfile/include -I/usr/lib/python2.7/dist-packages/numpy/core/include -I/usr/include/python2.7 -c PyMca5/PyMcaIO/specfile/src/locale_management.c -o build/temp.linux-amd64-2.7/PyMca5/PyMcaIO/specfile/src/locale_management.o
PyMca5/PyMcaIO/specfile/src/locale_management.c:27:10: fatal error: xlocale.h: No such file or directory
 #include <xlocale.h>
          ^~~~~~~~~~~
compilation terminated.