Add 'python3-devel' to the DNF bootstrap packages list

[sstangl]

Bootstrapping on Fedora 31 fails with a missing <Python.h> header.
That header is provided by the 'python3-devel' package.

Note that Fedora 31 does not ship Python2 packages anymore due to Python2 EOL.

Prior to this patch on Fedora 31, running python3 ./mach bootstrap results in the following build error:

    running build_ext
    building 'psutil._psutil_linux' extension
    creating build/temp.linux-x86_64-3.7
    creating build/temp.linux-x86_64-3.7/psutil
    gcc -pthread -Wno-unused-result -Wsign-compare -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -D_GNU_SOURCE -fPIC -fwrapv -fPIC -DPSUTIL_POSIX=1 -DPSUTIL_SIZEOF_PID_T=4 -DPSUTIL_VERSION=570 -DPSUTIL_LINUX=1 -I/usr/include/python3.7m -c psutil/_psutil_common.c -o build/temp.linux-x86_64-3.7/psutil/_psutil_common.o
    psutil/_psutil_common.c:9:10: fatal error: Python.h: No such file or directory
        9 | #include <Python.h>
          |          ^~~~~~~~~~
    compilation terminated.
    error: command 'gcc' failed with exit status 1
    ----------------------------------------
ERROR: Command errored out with exit status 1: /home/sstangl/dev/servo/python/_virtualenv3.7/bin/python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-2w6ff301/psutil/setup.py'"'"'; __file__='"'"'/tmp/pip-install-2w6ff301/psutil/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-pg5414df/install-record.txt --single-version-externally-managed --compile --install-headers /home/sstangl/dev/servo/python/_virtualenv3.7/include/site/python3.7/psutil Check the logs for full command output.

After this patch, python3 ./mach bootstrap succeeds.

• These changes do not require tests because it is adding a missing dependency.

[highfive]

Thanks for the pull request, and welcome! The Servo team is excited to review your changes, and you should hear from @Manishearth (or someone else) soon.

[highfive]

Heads up! This PR modifies the following files:

• @wafflespeanut: python/servo/bootstrap.py

[Manishearth]

@bors-servo r+

Thanks!

[bors-servo]

📌 Commit 3ba621e has been approved by Manishearth

[bors-servo]

⌛ Testing commit 3ba621e with merge a6df21b...

[bors-servo]

💔 Test failed - status-taskcluster

[CYBAI]

@bors-servo retry

• #25513

[bors-servo]

⌛ Testing commit 3ba621e with merge 24a4524...

[bors-servo]

☀️ Test successful - status-taskcluster
Approved by: Manishearth
Pushing 24a4524 to master...