Feature request: Build jemalloc with LG_PAGE=16 for non-4K page size aarch64

[teohhanhui]

See:

• Make --with-lg-page=16 the default option on ARM64 architecture jemalloc/jemalloc#2639
• When building for aarch64 on Linux, use 64K granularity by default for LG_PAGE to allow 64K and 16K kernel pages to work jemalloc/jemalloc#2845

• JEMALLOC_SYS_WITH_LG_PAGE=<lg-page>: Specify the base 2 log of the allocator page size, which must in turn be at least as large as the system page size. By default the configure script determines the host's page size and sets the allocator page size equal to the system page size, so this option need not be specified unless the system page size may change between configuration and execution, e.g. when cross compiling.

https://github.com/tikv/jemallocator/blob/0.6.0/jemalloc-sys/README.md#environment-variables

[teohhanhui]

Specifically:

AARCH64_UNKNOWN_LINUX_GNU_JEMALLOC_SYS_WITH_LG_PAGE=16

tikv/jemallocator#122 (comment)