Linking fails on pcre16_* functions

hxcpp 4.1.15
openSUSE 15.2

```
Creating /mnt/ssd/spg/highrisers/export/linux/obj/obj/linux64-debug/__pch/haxe/hxcpp.h.gch...

Compiling group: haxe
g++ -Iinclude -c -fvisibility=hidden -g -fpic -fPIC -Wno-overflow -DHX_LINUX -DHXCPP_DEBUG -DHXCPP_M64 -DHXCPP_VISIT_ALLOCS(haxe) -DHXCPP_CHECK_POINTER(haxe) -DHXCPP_STACK_TRACE(haxe) -DHXCPP_STACK_LINE(haxe) -DHXCPP_DEBUGGER(haxe) -DHXCPP_API_LEVEL=331(haxe) -m64 -DHXCPP_M64 -I/home/igor/build/haxe/lib/hxcpp/4,1,15/include ... tags=[haxe,static]
- src/lime/utils/AssetCache.cpp [haxe,release]
Link: ApplicationMain-debug
/usr/lib64/gcc/x86_64-suse-linux/7/../../../../x86_64-suse-linux/bin/ld: obj/linux64-debug/bef1792d_RegExp.o: in function `_hx_regexp_new_options(String, String)':
/home/igor/build/haxe/lib/hxcpp/4,1,15/src/hx/libs/regexp/RegExp.cpp:170: undefined reference to `pcre16_compile'
/usr/lib64/gcc/x86_64-suse-linux/7/../../../../x86_64-suse-linux/bin/ld: obj/linux64-debug/bef1792d_RegExp.o: in function `pcredata::create16(real_pcre8_or_16*, String, int)':
/home/igor/build/haxe/lib/hxcpp/4,1,15/src/hx/libs/regexp/RegExp.cpp:56: undefined reference to `pcre16_fullinfo'
/usr/lib64/gcc/x86_64-suse-linux/7/../../../../x86_64-suse-linux/bin/ld: obj/linux64-debug/bef1792d_RegExp.o: in function `pcredata::run(String, int, int)':
/home/igor/build/haxe/lib/hxcpp/4,1,15/src/hx/libs/regexp/RegExp.cpp:75: undefined reference to `pcre16_compile'
/usr/lib64/gcc/x86_64-suse-linux/7/../../../../x86_64-suse-linux/bin/ld: /home/igor/build/haxe/lib/hxcpp/4,1,15/src/hx/libs/regexp/RegExp.cpp:82: undefined reference to `pcre16_exec'
/usr/lib64/gcc/x86_64-suse-linux/7/../../../../x86_64-suse-linux/bin/ld: obj/linux64-debug/bef1792d_RegExp.o: in function `pcredata::destroy()':
/home/igor/build/haxe/lib/hxcpp/4,1,15/src/hx/libs/regexp/RegExp.cpp:103: undefined reference to `pcre16_free'
collect2: error: ld returned 1 exit status
The terminal process terminated with exit code: 1
```