lima: react to drirc option disable_ext_buffer_age

When GLX/EGL_EXT_buffer_age is disabled by this drirc option,
lima do not need to do render target reload if it's end of
frame.

Signed-off-by: Qiang Yu <yuq825@gmail.com>
10 jobs for !859 with topic/buffer-age-v2 in 8 minutes and 46 seconds (queued for 2 seconds)
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passed #292174
debian

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  Build+Test
passed #292176
meson-clang

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passed #292180
meson-clover

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passed #292179
meson-main

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passed #292175
meson-swr-glvnd

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passed #292181
meson-vulkan

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passed #292183
scons-llvm

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scons-nollvm

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scons-swr

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passed #292178
scons-win64

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