New issue by bda65 on void-packages repository

https://github.com/void-linux/void-packages/issues/21982

Description:
### System
Raspberry Pi 3B+
* xuname:  Void 4.19.81_1 aarch64 Unknown uptodate rF

* package:  
php-7.4.6_1
php-mysql-7.4.6_1

### Expected behavior
mysqli and pdo_mysql extension work.

### Actual behavior
mysqli and pdo_mysql not seen:
```
php -m
[PHP Modules]
Core
ctype
date
dba
dom
fileinfo
filter
hash
json
libxml
mbstring
mysqlnd
pcntl
pcre
PDO
readline
Reflection
session
SimpleXML
SPL
standard
tokenizer
xml
xmlreader
xmlwriter
zlib

[Zend Modules]

```
### Steps to reproduce the behavior
Install php and php-mysql.
Uncomment extension=mysqli and extension=pdo_mysql in /etc/php/php.ini

mysql extension work on my x86_64 PC:
Void 5.6.11_1 x86_64 GenuineIntel notuptodate rrFFF
```
php -m
[PHP Modules]
Core
ctype
date
dba
dom
fileinfo
filter
hash
json
libxml
mbstring
mysqli
mysqlnd
pcntl
pcre
PDO
pdo_mysql
readline
Reflection
session
SimpleXML
SPL
standard
tokenizer
xml
xmlreader
xmlwriter
zlib
```