readme: add explicit title ids to all titles that contain apostrophes

To work around divergence between 1.5.7+ and GitHub's header id generation:
https://github.com/asciidoctor/asciidoctor/issues/3093

README.adoc

@@ -1893,6 +1893,7 @@ For when it breaks again, or you want to add a new feature!
 
 See also: https://stackoverflow.com/questions/13496389/gdb-remote-protocol-how-to-analyse-packets
 
+[[remote-g-packet]]
 ==== Remote 'g' packet reply is too long
 
 This error means that the GDB server, e.g. in QEMU, sent more registers than the GDB client expected.
@@ -4442,7 +4443,7 @@ although this can be useful when someone gives you a random image.
 
 By default, link:build-linux[] generates a `.config` that is a mixture of:
 
-* a base config extracted from Buildroot's minimal per machine `.config`, which has the minimal options needed to boot: <<about-buildroot-s-kernel-configs>>
+* a base config extracted from Buildroot's minimal per machine `.config`, which has the minimal options needed to boot: <<buildroot-kernel-config>>.
 * small overlays put top of that
 
 To find out which kernel configs are being used exactly, simply run:
@@ -4472,6 +4473,7 @@ On top of those, we add the following by default:
 +
 We have since observed that the kernel size itself is very bloated compared to `defconfig`: <<linux-kernel-defconfig>>.
 
+[[buildroot-kernel-config]]
 ===== About Buildroot's kernel configs
 
 To see Buildroot's base configs, start from link:https://github.com/buildroot/buildroot/blob/2018.05/configs/qemu_x86_64_defconfig[`buildroot/configs/qemu_x86_64_defconfig`].
@@ -11420,7 +11422,7 @@ So we see in both cases that the `svc` is done, then an exception happens, and t
 
 The vector table format is described on <<armarm8>> Table D1-7 "Vector offsets from vector table base address".
 
-A good representation of the format of the vector table can also be found at <<programmer-s-guide-for-armv8-a>> Table 10-2 "Vector table offsets from vector table base address".
+A good representation of the format of the vector table can also be found at <<armv8-programmers-guide>> Table 10-2 "Vector table offsets from vector table base address".
 
 The first part of the table contains:
 
@@ -11637,6 +11639,7 @@ Latest version: https://developer.arm.com/docs/ddi0487/latest/arm-architecture-r
 
 We use: DDI 0487C.a: https://static.docs.arm.com/ddi0487/ca/DDI0487C_a_armv8_arm.pdf
 
+[[armv8-programmers-guide]]
 ===== Programmer's Guide for ARMv8-A
 
 A more terse human readable introduction to the ARM architecture than the reference manuals.
@@ -12370,6 +12373,7 @@ Native Windows is unlikely feasible because Buildroot is a huge set of GNU Make
 
 === Common build issues
 
+[[put-source-uris-in-sources]]
 ==== You must put some 'source' URIs in your sources.list
 
 If `./build --download-dependencies` fails with: