Build fails on Android using Clang 16 (termux)

I installed all of the appropriate dependencies for building, save for libselinux. Everything goes well until I get to building bubblewrap. Here is the output:

```sh
~/oro/bubblewrap $ meson compile -C _builddir
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: /data/data/com.termux/files/usr/bin/ninja -C /data/data/com.termux/files/home/oro/bubblewrap/_builddir
ninja: Entering directory `/data/data/com.termux/files/home/oro/bubblewrap/_builddir'
[7/10] Compiling C object bwrap.p/bubblewrap.c.o
FAILED: bwrap.p/bubblewrap.c.o
cc -Ibwrap.p -I. -I.. -I/data/data/com.termux/files/usr/include -fcolor-diagnostics -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -O0 -g -D_GNU_SOURCE -Werror=shadow -Werror=empty-body -Werror=strict-prototypes -Werror=missing-prototypes -Werror=implicit-function-declaration -Werror=pointer-arith -Werror=init-self -Werror=missing-declarations -Werror=return-type -Werror=overflow -Werror=int-conversion -Werror=incompatible-pointer-types -Werror=misleading-indentation -Werror=missing-include-dirs -Werror=aggregate-return -Werror=switch-default -Wswitch-enum -Wno-sign-compare -Wno-error=sign-compare -Wno-missing-field-initializers -Wno-error=missing-field-initializers -Werror=format=2 -Werror=format-security -Werror=format-nonliteral -MD -MQ bwrap.p/bubblewrap.c.o -MF bwrap.p/bubblewrap.c.o.d -o bwrap.p/bubblewrap.c.o -c ../bubblewrap.c
../bubblewrap.c:3062:13: error: call to undeclared function 'get_current_dir_name'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
old_cwd = get_current_dir_name ();
^
../bubblewrap.c:3062:11: error: incompatible integer to pointer conversion assigning to 'char *' from 'int' [-Wint-conversion]
old_cwd = get_current_dir_name ();
^ ~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
[9/10] Linking target tests/test-utils
ninja: build stopped: subcommand failed.
```

This is using Termux from F-Droid.